Impacts of reforestation on soil and soil organic carbon losses

IF 1.2 4区农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY

Ciencia E Agrotecnologia Pub Date : 2022-01-01 DOI:10.1590/1413-7054202246002622

G. Lense, T. C. Parreiras, Lucas Emanuel Servidoni, R. L. Mincato

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引用次数: 0

Abstract

ABSTRACT Water erosion is a serious environmental problem that causes soil degradation, compromises its fertility and causes soil organic carbon (SOC) losses. Reforestation, encouraged by Brazilian environmental legislation, is a way to reduce water erosion. However, in tropical and subtropical regions, there is little information on the impact of reforestation on soil loss rates and SOC. Therefore, this study aimed to apply the Erosion Potential Method, combined with multitemporal data from soil samples collected in situ, to estimate and spatialize soil and SOC losses in a predominantly agricultural Brazilian watershed that showed high rates of reforestation in the period studied from 2011 to 2019. The determination of the EPM parameters was carried out with the aid of a Geographic Information System and the soil loss estimate was validated with information from a hydrosedimentological collection station. The results showed that between 2011 and 2019 water erosion was reduced by 27.5%, while carbon losses were reduced by 32.7%. Among the evaluated crops, corn showed the highest soil and SOC losses, while coffee and forest areas exhibited the lowest rates. Reforestation of the basin is the main factor responsible for the reduction of soil losses. This process was initiated seeking to meet the requirements of the Brazilian Forest Code, which highlights the positive role that public policies can play in environmental conservation when respected and well applied.

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造林对土壤和土壤有机碳损失的影响

摘要水土流失是导致土壤退化、影响土壤肥力和土壤有机碳(SOC)流失的严重环境问题。在巴西环境立法的鼓励下，重新造林是减少水土流失的一种方式。然而，在热带和亚热带地区，关于再造林对土壤损失率和有机碳的影响的信息很少。因此，本研究旨在应用侵蚀潜力法，结合现场采集的土壤样品的多时相数据，对2011年至2019年巴西一个以农业为主的流域的土壤和有机碳损失进行估算和空间化，该流域的再造林率很高。利用地理信息系统确定了EPM参数，并利用水文沉积收集站的资料对土壤流失量进行了验证。结果表明，2011年至2019年期间，水土流失减少了27.5%，碳损失减少了32.7%。在评价作物中，玉米的土壤和有机碳损失率最高，而咖啡和森林地区的土壤和有机碳损失率最低。流域的重新造林是减少土壤流失的主要因素。这一进程是为了满足《巴西森林法》的要求而开始的，《森林法》强调了公共政策在得到尊重和良好应用时可以在环境养护方面发挥的积极作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ciencia E Agrotecnologia 农林科学-农业综合

CiteScore

2.30

自引率

9.10%

发文量

审稿时长

6-12 weeks

期刊介绍： A Ciência e Agrotecnologia, editada a cada 2 meses pela Editora da Universidade Federal de Lavras (UFLA), publica artigos científicos de interesse agropecuário elaborados por membros da comunidade científica nacional e internacional. A revista é distribuída em âmbito nacional e internacional para bibliotecas de Faculdades, Universidades e Instituições de Pesquisa.